No fever but cold may be caused by physiological factors, but also may be caused by pathological factors, such as low hemoglobin, hypothyroidism and so on. 1. Physiological factors: the patient does not have a fever but is cold, may be because the weather is cold, and the patient wears thin clothes, resulting in the patient’s body cold, need to add clothes in time, pay attention to body warmth. 2. Pathological factors (1) Low hemoglobin: If the level of hemoglobin in the body is low, it will lead to a decrease in the oxygen-carrying capacity of the blood, resulting in tissue metabolism disorders, which leads to cold symptoms due to the body’s lack of heat production. (2) Hypothyroidism: Hypothyroidism is a generalized low-metabolism disease. Due to the low metabolism, the body will be afraid of cold, resulting in coldness without fever, and the patient will also experience fatigue and weight gain. Coldness without fever can also be caused by hypoglycemia and other diseases, patients need to clarify the cause of the disease and follow the doctor’s instructions for treatment.